1389244141 has 2 divisors, whose sum is σ = 1389244142. Its totient is φ = 1389244140.

The previous prime is 1389244139. The next prime is 1389244169. The reversal of 1389244141 is 1414429831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 741745225 + 647498916 = 27235^2 + 25446^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389244141 - 2¹ = 1389244139 is a prime.

Together with 1389244139, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1389244141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1389244541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694622070 + 694622071.

It is an arithmetic number, because the mean of its divisors is an integer number (694622071).

Almost surely, 2^1389244141 is an apocalyptic number.

It is an amenable number.

1389244141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389244141 is an equidigital number, since it uses as much as digits as its factorization.

1389244141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 37.

The square root of 1389244141 is about 37272.5655274761. The cubic root of 1389244141 is about 1115.8167023484.

The spelling of 1389244141 in words is "one billion, three hundred eighty-nine million, two hundred forty-four thousand, one hundred forty-one".